View Compilation Error

0_0_22229713_6886.cpp: In function 'int main()':
0_0_22229713_6886.cpp:223:27: error: 'p' was not declared in this scope
         for(i=1;i<=n;i++) p[i].input();
                           ^
0_0_22229713_6886.cpp:224:11: error: 'struct Point' has no member named 'input'
         A.input(), B.input(), p[n+1] = p[1];
           ^
0_0_22229713_6886.cpp:224:22: error: 'struct Point' has no member named 'input'
         A.input(), B.input(), p[n+1] = p[1];
                      ^
0_0_22229713_6886.cpp:224:31: error: 'p' was not declared in this scope
         A.input(), B.input(), p[n+1] = p[1];
                               ^
0_0_22229713_6886.cpp:231:59: error: 'TriAngleCircleInsection' was not declared in this scope
             ans += TriAngleCircleInsection(C, p[i], p[i+1]);
                                                           ^